What is the primary function of the transverse tubules?
A. They attach muscle fibers to skeletal elements to exert force.
B. They conduct action potentials from the surface of the muscle fiber to internal regions near myofibrils.
C. They act as a channel for Ca2+ ions during excitation-contraction coupling.
D. They attach troponin to tropomyosin.
E. They form cross-bridges between actin and myosin during muscle contraction.
Answer: B
You might also like to view...
Red-green color blindness is an X-linked trait. In a population genetics study, 1,000 people (500 men and 500 women) were tested for this trait, and 35 men were found to be color blind
Use this information to compute the frequency of the allele for color blindness and the wild-type allele in this population, and estimate the expected number of carrier females.
How many children can a healthy woman potentially bear during her reproductive window?
A. 5 B. 10 C. 15 D. 20 E. 25
The ability of a pathogen to enter a cell, spread, and cause disease is termed
a. pathogenesis. b. invasion. c. colonization. d. adherence.
Which of the following parts of the Golgi complex receives materials from the ER?
A. Cisternal edges B. Cis face C. Trans face D. None of the choices are correct.